Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-019-0441-4 |
Earth's multi-scale topographic response to global mantle flow | |
Davies, D. R.1; Valentine, A. P.1; Kramer, S. C.2; Rawlinson, N.3; Hoggard, M. J.4; Eakin, C. M.1; Wilsons, C. R.5 | |
2019-10-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:10页码:845-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; England; USA |
英文摘要 | Earth's surface topography is a direct physical expression of our planet's dynamics. Most is isostatic, controlled by thickness and density variations within the crust and lithosphere, but a substantial proportion arises from forces exerted by underlying mantle convection. This dynamic topography directly connects the evolution of surface environments to Earth's deep interior, but predictions from mantle flow simulations are often inconsistent with inferences from the geological record, with little consensus about its spatial pattern, wavelength and amplitude. Here, we demonstrate that previous comparisons between predictive models and observational constraints have been biased by subjective choices. Using measurements of residual topography beneath the oceans, and a hierarchical Bayesian approach to performing spherical harmonic analyses, we generate a robust estimate of Earth's oceanic residual topography power spectrum. This indicates water-loaded power of 0.5 +/- 0.35 km(2) and peak amplitudes of up to similar to 0.8 +/- 0.1km at long wavelengths (similar to 10(4) km), decreasing by roughly one order of magnitude at shorter wavelengths (similar to 10(3) km). We show that geodynamical simulations can be reconciled with observational constraints only if they incorporate lithospheric structure and its impact on mantle flow. This demonstrates that both deep (long-wavelength) and shallow (shorter-wavelength) processes are crucial, and implies that dynamic topography is intimately connected to the structure and evolution of Earth's lithosphere. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488223800014 |
WOS关键词 | DYNAMIC TOPOGRAPHY ; SURFACE-TOPOGRAPHY ; GRAVITY-ANOMALIES ; GEOID ANOMALIES ; SEA-LEVEL ; MODELS ; CONVECTION ; LITHOSPHERE ; VISCOSITY ; DENSITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187545 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia; 2.Imperial Coll London, Dept Earth Sci & Engn, London, England; 3.Univ Cambridge, Dept Earth Sci, Bullard Labs, Cambridge, England; 4.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 5.Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC USA |
推荐引用方式 GB/T 7714 | Davies, D. R.,Valentine, A. P.,Kramer, S. C.,et al. Earth's multi-scale topographic response to global mantle flow[J]. NATURE GEOSCIENCE,2019,12(10):845-+. |
APA | Davies, D. R..,Valentine, A. P..,Kramer, S. C..,Rawlinson, N..,Hoggard, M. J..,...&Wilsons, C. R..(2019).Earth's multi-scale topographic response to global mantle flow.NATURE GEOSCIENCE,12(10),845-+. |
MLA | Davies, D. R.,et al."Earth's multi-scale topographic response to global mantle flow".NATURE GEOSCIENCE 12.10(2019):845-+. |
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